While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.

Considering these trends, value investing is clearly one of the most preferred ways to find strong stocks in any type of market. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.

Luckily, Zacks has developed its own Style Scores system in an effort to find stocks with specific traits. Value investors will be interested in the system's "Value" category. Stocks with both "A" grades in the Value category and high Zacks Ranks are among the strongest value stocks on the market right now.

One company to watch right now is Reinsurance Group (RGA Quick QuoteRGA - Free Report) . RGA is currently sporting a Zacks Rank of #2 (Buy) and an A for Value.

We should also highlight that RGA has a P/B ratio of 0.64. The P/B ratio pits a stock's market value against its book value, which is defined as total assets minus total liabilities. This stock's P/B looks solid versus its industry's average P/B of 1.32. Within the past 52 weeks, RGA's P/B has been as high as 0.91 and as low as 0.31, with a median of 0.58.

Value investors also frequently use the P/S ratio. This metric is found by dividing a stock's price with the company's revenue. This is a popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. RGA has a P/S ratio of 0.57. This compares to its industry's average P/S of 0.71.

These figures are just a handful of the metrics value investors tend to look at, but they help show that Reinsurance Group is likely being undervalued right now. Considering this, as well as the strength of its earnings outlook, RGA feels like a great value stock at the moment.